These multipurpose Mylar zipper PCR bags meet the demands of every retail establishment. You could choose from a range of baggie sizes to fit your needs if you need a nice zipper pouch or bag in particular gram or ounce sizes. These were for tamper-proofing concentrate containers for wax, dabs, and oil concentrates, or for retail goods or pharmaceuticals. We provide the pouches in black and white for states that demand completely opaque bags.